I agree with @stevejalim it's very easy to get carried away building using all the shinny new stuff, but there's no business reason to do it.
If you want to build a business, I'd look at the lean startup model and find the minimum viable product that tells you if people want this. If it's the same idea as you mentioned in the past, then that could well be LaunchRock page or a Google form TBH. If this is viable business, then time to market is important, particularly as you could be receiving revenue whilst you build a proper solution or even paying a developer.
If you just want to learn the latest tech, I'd just build a little thing that doesn't matter, like a todo list app. Though expect to throw most of these away, when you decide you don't like Go, Rust, Swift or whatever.